Re: RFC - Array slice syntactic sugar

From: Date: Fri, 20 Mar 2015 20:52:09 +0000
Subject: Re: RFC - Array slice syntactic sugar
References: 1 2  Groups: php.internals 
Request: Send a blank email to internals+get-85329@lists.php.net to get a copy of this message
Hi! >> My proposal is something similar to Pythons slice, in PHP this would look >> like: >> >> $slided = $array[1:4] >> >> This will get the elements in positions 1,2,3,4. (1 through 4 inclusive), >> ignoring the actual key of the array. The result for an array will be an >> array with the keys preserved, in the same order. I'm not sure how such operation would be useful, and it definitely would not be intuitive, as $array[0] and $array[0:1] (assuming non-inclusive semantic, or [0:0] with inclusive semantics) would return completely different things. That would happen even if the array has only numeric keys! This is the main problem with this syntax - unlike most languages where it is used, PHP arrays are not vectors, they are ordered hashmaps. Sometimes this is very convenient, sometimes - like for this syntax - it is not. I think this is the major reason why such proposals failed in the past. -- Stas Malyshev smalyshev@gmail.com

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